Improvement in match-planes



P. A. GLADWIN.

MATCH-PLANE.

No.185,442. Patented Dec. 19, 1876. f

UNITED STATES PATENT OFFICE.

PORTER A. GLADWIN, OF CHELSEA, MASSACHUSETTS.

IMPROVEMENT IN MATCH-PLANES.

Specification forming part of Letters Patent No. 185,442, dated December19, 1876; application filed November 6, 1876.

To all whom it'may concern:

Be it known 'that I, PORTER A. GLADWIN, of Chelsea, in the county ofSuffolk and State of Massachusetts, have invented certain Inlprovementsin Match-Planes, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, makingpart of this specification, in which- Figure 1 is a perspective view ofmy matchplane inverted. Fig. 2 is a perspective view of the two movablegages connected together and detached from the plane. Figs. 3 and 4 aretransverse vertical sections.

My present invention relates to certain improvements in match-planes forwhich Letters Patent of the United States No. 17 ,541 were granted to meJune 9, 1857.

The stock of the plane referred to was constructed so as to receive andhold a double iron--one portion for tonguing and the other forgrooving-two stationary gages being employed in connection with thisdouble iron; but on account of these gages being stationary only onethickness of material could be matched with a single plane, andconsequently a number of these tools were required to match boards ofdifi'erent thicknesses.

My invention has for its object to provide a single match-plane, whichcan be so adjusted as to adapt it for boards of various thicknesses; andconsists in a pair of movable gages, in combination with a stockprovided with both a tonguing and a grooving iron.

My invention also consists in so connecting or coupling these gages thatthey may be moved simultaneously in the same direction, in order therebyto insure the perfect matching of two boards of the same thickness.

My invention furthermore consists in making one of the gages adjustableindependently of the other, in order that the relative position of onegage may be slightly changed with respect to that of the other, wherebythe tongue and groove may be so located that the surfaces of the twoboards to be matched will lie flush with each other.

To enable others skilled in the art to understand and use my invention,I will proceed to In the throat of the stock is secured, by means of awedge, a double-edged tonguing-iron, c, a double-edged grooving-iron, d,being also secured within the stock bya wedge, e, a throat,

5, being formed in a plate, B, screwed to one side of the stock, throughwhich the iron d passes.

On the bottom of the stock A, opposite to that to which the plate B isscrewed, slides a longitudinal gage, G, of L shape in crosssection, andprovided with a metal facing, i, the distance of which from the edge ofthe groove is in the stock A is regulated by two thumb-screws, l l,which pass through plates m m, letinto the side of the gage, and enternuts 10, set into the stock A, as seen in Fig. 3, each screw being heldin place within the gage by a collar, q,- and by means of these screwsthe position of the gage with respect to the groove in the tonguing-iron0 may be varied as desired for boards of different thickness.

The part of the plane which cuts the groove is provided with a movablegage, D, by which the distance of the groove from the edge of the boardmay be varied according to its thickness. This gage D consists of aplate, which is connected or coupled with the tongning-gage O by twoslotted bars, r 1-, passing through the stock, the bars 1 T, whichproject from the side of the gage D, being secured to the gage U byscrews t, which admit of the distance between the gages being slightlyvaried, as desired; and when these screws are clamped or tightened thegages are rigidly coupled or secured together, so as to movesimultaneously in the same direction when operated by the thumb-screws lZ. By rigidly connecting the two gages G D, so that they will move incommon, the distance of the gage 0 from the nearest edge of the groovein the tonguing-iron 0 will be exactly equal to the distance of the gageD from the side of the grooving-iron d nearest to it, by which means thelocation of the groove in one board will exactly correspond with thelocation of the tongue of the other board to be matched therewith, sothat when the two boards are united their surfaces will lie exactlyflush with each other. I

The object of the slight independent adjustment of the gages by means ofthe clampingscrews t tis to provide a means whereby their originalrelative position may be restored with perfect accuracy in the event oftheir becoming accidentally displaced, or the distance between thembecoming changed by wear.

of the stock A and fitting into a recess, as shown, may extend theentire length of the stock, if desired. Instead of the gages beingrigidly connected, so as to move simultaneously, they may be movedtoward or from their respective irons by separate and independent screwsor other devices; butI prefer to connect them, as much inconvenience anddelay is thereby avoided, and the construction is simplified.

By the employment of adjustable gages boards of any thickness within thelimits of the movement of the gages may be matched with a single plane;whereas, were the gages The gage D, instead of extending along a portiononly and grooving irons c d, substantially as and for the purpose setforth.

2. The gages G D, made adjustable independently of each other by theslotted bars "M' and screws t t, in combination with the stock A,provided with tongning and grooving irons, substantially as and for thepurpose set forth.

Witness my hand this 24th day of February, 1876.

PORTER A. GLADWIN. In presence of- N. W. STEARNS, P. E. TESGHEMACHER.

